I imagine it'll worry people as much as read/write endurance did with SSD's when HAMR first goes live mainstream, but with all technology the first couple generations will always be more of "Beta" or "Prototypes" than a fully finalize product. HAMR will be with us for a long time to come, some estimates are putting it at 20 years for just HAMR alone to tap out and then still even further with HAMR + BPR to achieve past the 60TB 10Tb/inch2 arena.
The skill level will go up, but I have faith as the industry constantly shows, that the kinks will be worked out. Early adopters will always run the biggest risk with any new technology, but if not for them driving the market and being the beta testers, we might never see new tech come out.