Sure.
But the fundamental issue as I see it is the unpredictability of where his interests may take him by the end of college. Many people switch primary majors, some multiple times. Some end up interested in different areas of concentration within their major than originally planned. Some get interested in new minors, or second majors. And on and on.
So whatever he thinks he might be interested in as a rising HS senior is, to me, not necessarily all that predictive of what he will be interested in as, say, a rising college senior.
And in fact, a lot of these LACs specifically encourage all that. You typically don’t apply into a specific major. You may not even be allowed to declare a major until something like the end of your second year. They may have relatively open curriculums that encourage exploration outside of your intended major at whatever depth you end up being interested in doing. And so on.
As I see it, that’s great! But it does lead to at least a hypothetical worry–what if you do all this work to see what LACs seem to have plenty of courses you would want to take based on what you are thinking as a HS student, and all of that is mooted by your changing interests in college?
Now, of course these very good LACs tend to have pretty good depth in anything they offer. But given their size, they can’t really cover everything in as much depth as, say, a private university with a much bigger faculty AND graduate students who teach (which is not necessarily great, but it allows for even more course depth).
So, as I see it, these consortiums backstop that issue. Maybe you will find all the courses you want at your college, but maybe your interests will go in an unexpected direction, and your college will end up not quite having all the courses you would want. But hopefully one of the co-colleges will, and indeed it seems apparent they are often pretty intentional about covering each other in various ways.
And then you get all the other nice things about an LAC, without having to be concerned about this potential issue.
Wesleyan, has been fairly successful at attaining a size approximating two small-sized LACs.
Again, I am not suggesting the consortium model is the only right model. Still, Wesleyan has something like 3000 undergrads. The 4 LACs in Five Colleges have about 7200 (Smith, by the way, is closest in size to Wesleyan at about 2500), and then UMass-Amherst adds about 24000 undergrads.
That’s not to say Amherst or Smith or so on are clearly a better choice than Wesleyan. But these are different situations, and some people could rationally prefer one or the other, for this and other reasons.
In the end, I am fond of the saying there are many roads to Dublin (and the poem by Tomás Ó Cárthaigh). The road to a great “liberal arts” college experience, and excellent placement for whatever comes next, could go through a research university with a liberal arts college, a liberal arts college that is part of a consortium, or a liberal arts college that is largely independent. And the best road for one is not necessarily the best road for another, and that is OK.