Some instructors thought this too much for a trial lesson or any sort of instructional flight
Absolutely nothing wrong with those conditions. Ex 12,13 and 16 might be a little bit tricky for the student, but good practice. At the end of the day you want your student to be a competant pilot and not just somebody that can pass a skills test. However I would be careful with trail flights on windy days. I dont want to scare of a potensial student and only carry a limited supply of sickbags with me.