To be fair there are some sorts where the seeds can be overwhelming, but that's not what you usually get in the supermarket. In cucumbers you can normally buy removing the seeds/ watery core in my opinion only makes sense when you for example make Tzatziki, as otherwise it can get rather watery.

It's very common to use a peeler to peel the skin, then keep peeling until you get to the seeds and just use those peeled strips.