It’s not minimum time that is supposed to the issue for meaningful comparisons between riders, it’s distance, 0.5 miles.
Strava won’t let you create a segment of less than ~0.3 miles these days.
One of my favourite incidental things associated with my fitness riding over the last ~18 months, mostly up hills, is identifying potential categorised hill segments; riding them and then creating the segments. Think I’m now up to ~13 cat3/4s around Warnford in the South Downs and two cat3/4s near Longleat, you can identify mine because I usually put “cat 3/4 climb” in the title because Strava does not use their cat climb red circles on the Android app. 😉