I respond to those people that, using that logic, Picard has been dead since season one's Lonely Among Us. He was beamed into the nebula as energy only and had to be recreated through the transporter buffer pattern memory, if I recall correctly. There are flaws in that theory, but there are flaws in the theories that of the people that I'm responding to as well, so it evens out.
It’s in the “golden era” of Trek though that seems to be untouchable to some. There’s even a precedent for what happened to Picard when Ira Graves transferred his consciousness into Data in whatever season 2 episode it was, I don’t remember there being a big discussion on whether it was a transfer or a copy.
I remember there was a bit of backlash about Harry Kim being replaced with his duplicate in “Deadlock” and O’Brien being replaced with his “couple of hours into an alternate timeline” self in “Visionary”. 25+ years later and nobody is bothered now.
Just wait for the outrage when some new show in 2050 tries to completely retcon Picard transferring bodies as a dream or something. “These new writers don’t know Trek at all!”