Did my dentist shave my teeth down when it wasn’t completely necessary?

I'm sorry to hear about your experience. It's always concerning when you have dental issues, especially with your front teeth. It's important to remember that while I can provide general information, specific cases like yours require personal consultation with a dental professional for accurate advice.
When it comes to cracks in teeth, the treatment depends on the extent and location of the cracks. If the cracks are superficial and don't compromise the structure of the teeth, they may not require extensive treatment like veneers. However, if the cracks are deep and threaten the integrity of the teeth, more proactive measures like veneers or crowns might be necessary to prevent further damage.
Veneers are a common solution for cracked, chipped, or discolored teeth. They involve shaving a thin layer off the front of the teeth and replacing it with a porcelain or composite veneer. This can restore the appearance and function of the teeth. However, veneers are a significant commitment, as the process is irreversible — once your teeth are shaved down, you'll always need to have veneers.
Given your situation, seeking a second opinion is a reasonable course of action. Different dentists might have different approaches, and getting another perspective can provide peace of mind and more information on potential alternatives. Additionally, a second opinion might help you feel more comfortable and informed about the treatment you're receiving.
Remember, it's crucial to communicate openly with your dentist about your concerns and treatment preferences. A good dentist should explain all available options, including their risks and benefits, and help you make an informed decision.

Your doctor's rude behaviour cannot be tolerated, but it should be noted that she has a more accurate and sufficient point of view than you in terms of knowledge. You also could not upload your photos, so I cannot make a comment without seeing them.