Sounds pretty personal, and exceptionally ignorant.
I do most of my hunting with 3 cartridges - one invented 60yrs ago, one 61yrs ago, and the third 117yrs ago. I just happen to compete with two cartridges, one developed ~25yrs ago, and the other invented 14yrs ago, as an adaptation and replacement of the cartridge I'd shot for ~20yrs which had been invented 68yrs ago. I did happen to shoot a meat doe last season with a Marlin 336 in 30-30, a 1973 model. But those ~60 shots I took last year in practice, load development, and hunting with that rifle is a much smaller round count than what I shoot for competition, and frankly, the 30-30 is a pretty well known entity, and there's little challenge in getting it to shoot small enough for deer hunting, so it's not a topic I commonly discuss on forums - frankly, it's just not interesting.
I'd put a bolt action 6.5x55 Swede in my son's hands as a first deer rifle long before I'd consider a bastardized bolt action 30-30, which you might recall shares the same birth year as the .30-30, with EXCEPTIONALLY better performance. I'd be disappointed for the OP's son if the OP took your advice, and I'd expect -as you stated about your own son - that his son would either lose interest in shooting and hunting, or at least would lose interest in shooting and hunting with that bolt action 30-30 - which is clearly akin to what the OP is seeking in either a 6.5 Creed or 270win.