Well, top 100 colleges admit students who will be successful wherever they go or whatever they do.
Percentages of earning PhDs show that SLAC education is not a disadvantage for STEM students but possibly an advantage.
Most grad school attrition occurs during first three years. After 5-9 years, 1-2 out of 10 students do not earn STEM PhD. I don’t know if that’s high or low, that’s your call. I do not know how many MDs failed to get license after medical school.