It's hard enough to get clients, but then to have to say.. oh, also please use this other payment system which I will likely have to walk you through setting up once you clear it with accounting?
The genie's out of the bottle. Once your funds are on chain, you have instant settlement, zero fees, and zero risk of an intermediary arbitrarily freezing your funds. No point in going back, unless your counterparty demands it.
I suspect the rest of the commercial world will become much friendlier to it as more and more businesses are onboarded.
The pros vastly outweigh the cons and if you need something like escrow (or another trusted intermediary) then you can always revert to the legacy financial system for that. Both have their use cases.