In the Name of Allah, The Most Beneficent, The Most Merciful.
Although every Fiqh opinion is based on evidence, often times, the scholars differ in their views. This room for differences is a mercy from Allah, and as long as there is evidence to support an opinion, then we must respect scholars' views, even if we may not always agree.
The Prophet (SAW) said:
"Whoever performs Ijtihad and errs will receive one reward. Whoever performs Ijtihad and arrives at the correct answer gets double the reward"