Anyone that does not want their images stolen should likely never put them on the web, period! I have no delusions about my images being of value to anyone other than myself so I long ago gave up caring if anyone wants to use them for non commercial purposes. I began uploading full size images about six months ago after we switched our internet to fibre and the full size images did not bog down the uploads. Before that I would upload a full size image on occasion for someone I knew that had requested it.
There really is little point, in my opinion, of showing one's work in a lesser light than one could. At this point in my life if someone 'borrows' one of my images for their own use then at least the image will not die with me because I do not think anyone is going through the thousands of images I have stored on drives on my computer or NAS.
That is my take on it anyway. There are people that do sell images so I understand their desire to protect their financial interests. Trying to make money from photography sounds too much like work to me at the 3/4 century mark.
By the way, I have tried several Ai resizing apps and from my experience have found each that I tried to be far less than promised. If there was any improvement it was miniscule. I never once saw what they showed on the application sites for improvements! Perhaps a bit like Ai noise reduction, sometimes it works wonders but often it is no better than what I could achieve before and one application might work for one image but totally mess up the next. I have seen that with both DXO and Topaz deNoise Ai.
Andrew