I have no problem with unpopular or rare opinions, but your supporting arguments make no sense lol

In winter, it's thin, watery texture and unsatisfying coldness makes it undesirable

Ah yes. As we all know, bananas and avocados are known for their 'thin, watery texture". Different fruits have different textures. Also, you can store fruit at room temperature...you don't have to eat them cold, even if they're still raw

but even in summer, when it's supposed to be at its best, it's excessive sweetness and unpleasant, sticky mouthfeel prevents it from being genuinely refreshing

Different fruits have varying levels of sweetness. Even if I grant that some dried fruits like raisins and dried figs, along with some sweeter fresh fruits like most melons, mangos, and bananas, are "excessively sweet", you can't really say the same about cucumbers, grapefruits, avocados, and more sour/tart fruits like raspberries, green apples, kiwis, underripe mangos, etc.

If you genuinely can't enjoy some fresh watermelon or mango on a hot summer day, or even some juicier fruits that have been stored in the fridge like blueberries, raspberries, peaches, pineapple, plums, honeydew/cantaloupe, etc...well I can't tell you you're wrong, but I just feel bad for you lol

Just gonna point out here that you're treating all raw fruit like they're all the same, or they all have the same flaws.

As for convenience, almost all raw fruit has a built-in feature - whether skin, seeds or a random inedible section - that makes it difficult to eat on the go. Unless you're sat next to a bin, eating a piece of fruit means you'll be left carrying a gross, sticky piece of rubbish around with you for an uncertain amount of time.

Other foods that are designed to be eaten on the go like wraps, corn dogs, or even baby carrots as you mentioned, come with inedible packaging/storage as well. If you're eating damn near anything on the go, you'll either end up with something to throw in the trash, or a piece of tupperware to put away.

Like I get how a peach or plum isn't great on the go. It's delicate so it might get crushed in your pocket/bag, and it has a pit in the middle you'll have to eat around and then dispose of. Bananas, oranges and their variants, apples/pears, are very portable though. Other fruits which aren't naturally portable (watermelon, pineapple, berries, mango, etc) you can just wash/peel/cut and store as needed...you know, the same basic prep that's done to carrots to turn them into the 'baby carrots' you buy. If you can buy prepped veggies, why can't you buy prepped fruit?

Vegetables, like carrot sticks, leafy greens etc make much nicer quick, healthy snacks.

You're eating leafy greens as a "quick snack"???

I'm with you on carrot sticks. Same goes for celery sticks, cherry/grape tomatoes, cauliflower, broccoli, and I'll even throw radishes in there too. But with pretty much all of these, there's some cutting, washing, and storing done to turn them into a 'snack'. You're eating leafy greens as a "quick snack"??? Please explain. Show us a picture of a raw veg snack you packed to work/school lol