The pandemic was met with wildly different reactions from clubs, which is why that season very much deserves an asterisk. Some clubs took huge precautions because the severity of COVID was relatively unknown. Others didn't and were able to capitalize on the fact that many clubs were holding back. Some clubs were heavily hit by players getting sick, others were lucky enough to remain largely unaffected.
While the title from that season does count, it is absolutely fair to acknowledge the strong likelihood that Liverpool won it precisely because of the pandemic and the way it threw the whole season into complete disarray. It caused a situation where nobody else challenged for the title at all because it was anyone's guess what the consequences of going 'business as usual' might be.
In some ways, it could be called mildly irresponsible to approach it as an opportunity to snag an easy title while the world grappled with not just the disease itself but also the many people who refused to take precautions against it. Not a great example for a major sporting institution to set. I wouldn't go so far as to say that Liverpool contributed to things like the anti-mask movement, that would certainly be overstating the case; but many clubs held back and took every possible precaution exactly because of the potential optics of not doing so, given what society was dealing with in that regard.
For that reason, that year's title is worth the least of any PL title ever won.