I went throught this same thing with my daughter.
Just My Opinion. Playing college tennis has some drawbacks in that it limits what schools you can attend and it is time consuming and he may end up not liking the coach or his fellow players or traveling and the scholarships are not that big. If he really likes tennis he can still play in tourneys on his own. Still college tennis could make sense if the family was hurting for money and he got a good sized tennis scholarship.
OTOH, if he can get top grades in high school he can attend a prestigious top college which will serve him well the rest of his life. Recreational tennis will always be there.
Everybody has their own needs and priorties. gl