On macOS, Arturia Software Center does not give an option to not install VST/AAX. At least, I do not see this option.
What I actually found, is that one can move /Library/Arturia folder (the folder, in which standalone synths are installed). I have moved it today to the external drive, and it works! Each synth asks now full-disk access, but after that everything works smoothly.
Yeah, removing manually after each update is too much hassle, I think.