In commercial fishing, when a new or improved method is invented, it's called "technical creep". In other words it is accepted that people will always endeavour to improve their catch rate, whether commercially or for sport. We all go fishing to catch fish....not let them go! I therefore see nothing much wrong with baitboats, as long as they are used responsibly.
If I could afford or warrant the expenditure for one, I would definitely buy one. It's just another tool in the weapons chest.
I can remember, from the fifties, the furore when fixed spool or "threadline" reels were coming on the market. The anti-argument was that they made the job of catching fish too easy, because of the ability to cast long distances with the new toys.
Think a bit about this. How do you think carp, or other species, fishing would have developed if we had been restricted to centrepins.
But, I generally fish very large, relatively non pressured lakes and gravel pits and wouldn't effect anyone with their use. If I owned the average fishery, I agree that their use is unviable, because today's average angler hasn't the brains to consider others