So, insects are a type of animal and they feel pain, just like we do. You're right, plenty of plants do depend on bees and that's actually one reason why the honey industry is so bad. You see, they kill the bees in the honey industry when it gets to winter, as it costs them money to keep the bees during a season when they can't produce honey. Because of this industry, we then have fewer pollinators and could end up with only four or five types of plants left to eat if we continue to consume honey.
Also, are you aware of what happens to the bees in the honey industry? They cut the queen bee's wings off because if she leaves the hive, the other bees will leave. Then, they artificially impregnate her with a long rod so that she will make more bees against her will. The bees are basically trapped in this exploitation and pain of being stunned by gas and having their food taken from them.
What if this was us in their position?
Also, are you aware of what happens in the egg industry?
For more info on eggs:
https://youtu.be/B-gSoXwFlIE
For more info on honey:
https://youtu.be/AvV_vGFJa6s