Isn't it a bit strange to consider date flexibility as opposing the advantages of the low season, as if one had to choose between the two?
If we hadn't already invested so much attention in this idea of opposition, would we see that flexibility is actually a prerequisite to fully enjoy the low season?
How could you have fewer people or more local interactions if your travel dates are rigid and force you to leave in peak season, for example during August holidays?
It is the ability to manage your time that opens the door to reduced fares and tranquility, not something that opposes it.