Negligible amounts of money my ass. I spent as much pocket change as I could get my hands on every day in my local arcade. Back of the envelope, I could have bought a Neo Geo and a copy of the game easily with the coins I dumped into SamSho2 after class (we got kinda competitive on that one). You want to know the worst part? It also led to me paying full price for the crappy home version of SamSho 1 on top. Ditto for Street Fighter 2, although I'm not sure I could have afforded a CPS1 cab.
As for wanting physical gacha banned... well, you're assuming I have a problem with loot boxes, which I don't, particularly. They can be fun. I don't mind them. I don't buy them for real money pretty much ever, but I can dig a gacha game for a bit.
I would age gate both, probably. That seems like a good call. Age ratings exist for a reason. You may be surprised by this, but I also don't have a problem with actual gambling being legal among consenting adults. You're gonna be shocked when you hear how I feel about alcohol and drugs, too.