Sam2 and DaasYochid: Please!!!
“koach deheteira odif” means exactly what it says (and Rashi says it explicitly): it is very easy to be ‘machmir’: just say no. However, to be able to be ‘meikel” (and allow something), you need more sources and more understanding and (as Rashi says) you are not AFRAID to be meikel! Hence, the reasoning behind a hetter is more authoritative. And the gemoro calls it “ODIF”-stronger and better! Please do not twist the gemoro and Rashi to your wishes!!
And please, check Pesochim 74B (that neither of you mentions) and you will see again that the gemoro DOES pasken “lekuloh”, rather than “lechumro”.