Let's consider your statement and ask a simple question: is it really a "treatment for a deadly disease"? The survival rate of the virus is around 99.5% overall, and even higher than that for younger people. In fact, if you look at the latest CDC data, you'll find that in the U.S., for people ages 30-39, COVID has killed only 1 of every 4058 people. So much for the claim that it's a "deadly disease" across the population.
Further, despite initial claims, it's becoming clearer and clearer that the vaccines aren't effective as wished. Not only do the vaccines not prevent people from catching COVID, they don't prevent people from dying from COVID. They also are only temporary in nature. Yes, the vaccines do provide a temporary decrease in the severity of the virus, but they also come with certain potential harmful side effects.
So when governments want to force a leaky vaccine with potentially harmful (and unknown long term) side effects onto entire populations which are overwhelmingly not at risk of dying from a disease, I consider that to be pretty authoritarian.