If he only lives on Adsense, sure. But even then, if he posted to PeerTube as well, would he actually be missing out on Adsense money, considering the few viewers in PeerTube atm?
However, on external sites it’s an issue. Here the link it always static. You can install an addon that automatically redirects you to your own Lemmy instance. I have this on Firefox.
What made it a bitch? Genuinely curious.