Short answer: No

Long answer: No, because while the gamer demographic has somewhat changed from young people to now young people and adults, Steam should foremost cater to the young under 21 audience. When i first made a account here(my first one, this here is my second account) i didn't think about erotic stuff very much, i just wanted to play Dawn of War with my mates and destroy Xenos all day long. Steam shouldn't cater to old perverts like me who see the Xenos in their pants all day long. The original Steam as we know it know is a family platform and should enforce that image and adult games have no place there.
However there is no arguing about it that the mature adult gamer exsist and the group is growing everyday, and do like games with a more aquired taste so to speak. Certainly when there are a lot of middle aged humans who feel betrayed by society, have checked out or have been dealt a bad hand in the healthy body department like me.

Solution: Make a seperate platform for adult gamers, call it the Boiler Room and shove everything too erotic, edgy, for under 21 players there. Require a real ID at account creation so Valve is protected from liabillity. Made it so that you can only pay with points you can buy with credit from your Steam wallet.

Pros:
-Steam stays in its original form and does not change, so there is no trouble with its current user base getting used to a new platform.
-Tender young minds are protected from the filth of the adult world and can be children for a little longer.
- Developers can make a clear choice for which demographic to create a game so they don't have to censor pantyshots, language, or difficult themes. Either it is included in the game or not, no halve measures like a void under a skirt or gore removed.
-Activist groups and payment processors should be happy, brand names are protected and so are our children.
- Valve can be the pioneer with this, discovering new grounds and garnering praise from it fanbase, restore trust and give all NGO's and busybodies the middle finger.
- No adult games slipping through and end up in search results since the shops are seperate and have no contact so to speak other than the Steamwallet system.
-Steam brandname is protected since there is and with a seperate shop never will be adult, erotic games on the Steam store.
-Seperate communities where moderaters can be a little more lenient.

There will certainly be more pro arguments, but those are the ones i could come up with fast.
Cons:
-Uncle Gabe has to come to land to direct construction on the new shop and i am not sure if the sea will give him up.
-Investment, effort, dollars from the side of Valve.
- A somewhat split community, while i think this is a pro, one can only be in one place at a time. But with al the discords and other means of communication i think this problem is neglible.
-Developers need to reconsider their development strategies for whom to develop games, so they can make money but not all the money. Again somewhat a pro for me since every game is the same grey goo to me atm. Make a game for gamers but not for all the gamers if you catch my drift.
-Comsumers have to create a new account, create a new community, and get used to a new shop.
-New moderation team will be needed, plus a new infrastructure and a game acceptance team(for the love of....please no Mary).
-Make changes and have represntatives for Japanese developers, improve communication with indie one team developers. I write this as a con since it goes with investing and effort, but it is rediculous that the communication and transparity from Valve is so lacking.

So these are my thoughts, well showerthougts actuallly. Would you like to see a different shop for the 21+ where we can buy our hardboiled, edgy, erotic games?. Do you have more pros or cons?. Did you lick a lampost this winter?.

Thank for reading. Discuss in a civil adult manner. Dont feed the trolls, they are all morbid obese.