Sure it could turn out different, but it seems more likely to be like that as far as I know
The RNA vaccines at least specifically target the part of the Covid virus that makes it special compared to other coronaviruses. If that part mutates in a way that invalidates the protection caused by the vaccine, it almost certainly renders the virus harmless anyway.
Even if the protection does expire, there is no reason to believe it happens at flu-like timescales. Of course if by (is that the right preposition btw?) "constant refreshing" you mean every decade or so, that is possible.
There is also empirical evidence by now:
- https://www.nature.com/articles/d41586-021-01222-5 (protection against variants)
- https://www.nature.com/articles/s41586-021-03738-2 (lasting immunity)
> No, they never did.
Dr. Anthony Fauci: Coronavirus Will Become ‘Seasonal’ Like The Flu https://www.blackenterprise.com/dr-anthony-fauci-coronavirus...
During his guest spot on NBC News’ Meet the Press, Dr. Anthony Fauci, an immunologist who serves as the director of the U.S. National Institute of Allergy and Infectious Diseases (NIAID) and medical advisor to the president, said that virus will become “seasonal.”
Fauci: Coronavirus Vaccine Booster Shots Likely Needed https://www.usnews.com/news/health-news/articles/2021-05-26/...
"I don't anticipate that the durability of the vaccine protection is going to be infinite," Fauci told a Senate subcommittee. "It's just not. So I would imagine we will need, at some time, a booster."
It's not what they intended, sure, but that the Covid vaccine has to be refreshed every year or so is what I understood and what they actually said.