Mostly, they are primarily concerned with receiving sats. Giving sats to someone else doesn't cross their mind to the same degree afaict (which is why we've always incentivize zaps via rewards even when we were custodial).

Also, wallets that are capable of sending programmatically are harder to find/operate. Everyone (dealing with lightning) probably has a custodial wallet that can receive zaps via a lightning address, but even most custodial wallets don't support programmatic sending. Mobile, noncustodial wallets are incapable of doing it. That leaves a handful of options - none easy.

In lightning we talk about the problem offline receiving a lot, but online sending beyond scanning a QR code (let alone offline sending) is practically never discussed excepting Alby and the ecash people.