One of the things that looks bigger with higher magnification is the tremor that comes from holding the optical device. Spotting scopes are normally used on tripod or clamped to a window so you can use the very high magnification. A rifle held to the shoulder is a more stable support for its scope than your free hands for binoculars, so the latter are usually the worst for tremors and this limits the usefulness of high magnification in binoculars. Higher magnification also reduces the field of view and the brightness of the image at any given lens size. It used to be commonly said that 7x was the highest magnification that most people could use for long without tiring their eyes with the magnified tremor. 8x, 10x and even 12x seem to be pretty popular these days and I don't know if that's because lighter materials mean those users aren't shaking them as much (I still use 6x or 7x) or because it's more profitable to leave people uninformed and sell them on the idea that more magnification is better.
For brightness of image, divide the objective lens size by the magnification to discover the exit pupil, e.g. 7x50mm gives you a little over 7mm exit pupil, and this roughly matches the largest opening of an average young adult human pupil. So the same binocular (quality of glass and coatings) at 8x50 would give a smaller exit pupil and less bright image. A 6x50 would give a larger exit pupil but you wouldn't get the benefit of the brighter image because your pupil won't open wider to take in more light. And as you age, your pupil won't open as wide so if you are in your forties you probably aren't getting any benefit from an exit pupil bigger than 5mm. In that case, you might look for a more compact binocular with the same magnification, and getting better quality glass and coatings for your money becomes even more important.
But there is still field of view. Most optics will be marked on the package at least, if not the equipment itself, with the width of the field of view at a sample range.
People like to say "you get what you pay for" but it's more accurate to say you'll pay for what you get, and if you don't know what to look for, there are always makers who will sell you less performance for more money. Good quality optics aren't cheap, but expensive optics aren't necessarily good. You have to do your research to ensure you get the best performance at any given price.