Less lethal is a tricky measure - considering many factors - did the most vulnerable already die, is resistance up (vaccinated or otherwise), are treatments once infected more effective now than before, are people finally washing their hands more (ewww), transmissibility (masks or otherwise), are people more careful when exposed - the OPs question (some I suppose), passive tracking and alerting, and are the variants changing etc etc etc - doesn’t mean it will always be this way (I.e current spike in hospitalizations).
Lots of pseudo scientists and science to sift through. Disturbing to think on the other hand that some may be rooting for the mRNA vaccines to cause cancer and other long-term health effects so they can be “right” - but it does tells me how far gone our society is today - which is FAR more detrimental to our future tbh … but not surprised anymore.