I think your rationale is probably a good one - that if you're taking a shorter ride you're probably interested in a shorter cool down as well. My guess is that they may serve up options based on data science predicting what those people are likely to want but they may not.
I would fill out a feature request form for Peloton and submit your suggestion
support.onepeloton.com
I would fill out a feature request form for Peloton and submit your suggestion
Submit a request – Peloton Support
