Climbing shoes are designed to fit tightly to provide maximum precision and support while climbing. A tight-fitting shoe can help you better feel the rock and make more precise movements. Additionally, a tight shoe can help you use your toes to push against the rock, providing more power and control.
However, it's important to note that the tightness of your climbing shoes is a personal preference and can vary depending on your foot shape and the type of climbing you're doing. When trying on climbing shoes, look for a snug fit that's not painfully tight and allows you to wiggle your toes a bit.
They are tight to help you use your feet better. That tightness is what allows you to keep your feet and weight on small holds, to pull your weight with your toes and heel, and to stand on difficult holds on terrible slabs.
The tightness allows you to just use your feet in a much more efficient way, maximizing you precision and foot power.
