The issue of adding to the commandments seems to me to be serious. It is just like the Torah says "Do not add and do not subtract to these commandments that I have commanded you this day". You can see what happens when lots of things are added "to make a fence" around the law that then automatically changes the whole structure of the law itself and certainly detracts from the actual fulfillment of real commandments when all people's energy is devoted to keeping pseudo commandments.
This is what it actually says in the commentary on Pirkei Avot by an amora R. Natan. [It is printed in the Vilna Shas after the end of seder Nezikim which is where Pirkei Avot itself is. אבות דר' נתן על פרקי אבות על המשנה לעשות סייג לתורה
There are examples of being strict about addition stuff results in open violation of actual commandments of the Torah. This is not just in theory.
This is what it actually says in the commentary on Pirkei Avot by an amora R. Natan. [It is printed in the Vilna Shas after the end of seder Nezikim which is where Pirkei Avot itself is. אבות דר' נתן על פרקי אבות על המשנה לעשות סייג לתורה
There are examples of being strict about addition stuff results in open violation of actual commandments of the Torah. This is not just in theory.