Secondary Steam account: pros and cons

So in these last days I've been thinking about making a second steam account, because of all my double game keys I have, mostly free games like woodle tree adventures that EVERYONE has. Then I thought I could use it for other things, but there are many cons and pros that I'm still insecure about and wanted to have a general opinion here.

Pros:

• Idling cards for free duplicate games
• You can use it as a bot (trading cards 1:1 mostly with other people, or other stuff) and as storage for important items
• You can get more event cards (if the level is high enough) during steam events for your main
• You could smurf (i guess? i don't play online games)
• You can double the " you can buy 10 games max in a hour limit"
• Girls like bots

Cons:

• New accounts are limited, you have to put or spend 5$ on it (you can't use market on anything so only steam wallets work)
• You have to put time in it
• You have to link it to another number or 15 days of trade hold

What do you guys think of it? A lot of people have a secondary account for cards and other things that they use as a bot, but I don't know if it's really worth it in the end. Are there more pros and cons that I didn't list?

Pool is obvious, maybe

Edit: there was another thread like this open and I didn't see it, will wait for the gib to have more entries then I will close it :<