> Do merchants actually want to get rid of the 2-3% transaction fees?

TL;DR: "stablecoins" are just adding another level of indirection with a different (not necessarily better) tradeoffs than other payment methods / mediums of exchange

So called "stablecoins" (Transferrable USD Depositary Receipts / Commerical Paper) are not cheaper than credit cards. They're just moving the fees to other places in the pipeline: converting fiat to a "stablecoins", and/or converting "stablecoins" back to fiat

The transactions themselves are much more expensive than CC transactions, unless u use a less secure L2 chains, which are just databases in disguise

Add to this issuance/underwriting fees, and insurance b/c of the possibility of losing the principal and/or your coins being blacklisted or stolen

For "stablecoins" to be cheaper the majority of economy should adopt them, and then part of the conversion to fiat fees will cancel each other

The main problem is that credit card companies sign up merchants to offer the same prices for CCs as for cash, in essence puninshing people who pay with cash. This trick is what subsidizes this entire industry. In the jurisdsictions were this is illegal - the cash is still the king