What you don't seem to realize is that during actual driving, you don't need to use the touch screen at all. Every meaningful, required interaction with the car (except arguably wiper speed setting I guess) is controlled with physical controls
The 3 has a brake pedal, gas pedal, steering wheel, two 4-way physical switch/dials on the steering wheel front, a stalk on the left and a stalk on the right. On the left stalk you can lever it up down forward and back. On the right stalk just up and down. But stalks have two positions for levering in each up and down direction. Finally, each stalk has a button at the end.
To engage drive mode (P, D, N, R) you use the right stalk by either lifting or pulling down for D or R, partially lifting or pulling down and holding it there for N, pressing the button at the end for P.
On the left, you use it for signalling like normally. Partial levering signals 3 clicks, full levering signals continuously like normal. Pressing the button at the end partially activates the wipers, pressing fully and holding activates the fluid and wiper action. Levering away from the driver toggles high beam mode, levering towards and holding forces high beams on.
The front 4-ways, the left one generally controls volume and track selection of the music while the right one controls driving settings relevant to the autopilot/TACC features. Specifically, clicking left/right adjusts the follow distance and rolling up or down controls the set target speed.
As for mentioning the pedals it's because 1) single-pedal driving is a big thing with tesla drivers due to the strength of the regenerative braking, so your throttle has more impact on your driving than a classic pedal. Feels a bit like a combo clutch/throttle if you're experienced with manual cars. And the brake pedal has a dual purpose. When at a full stop, pressing it firmly activates "hold" mode which is basically and automatic parking brake. Pressing it firmly releases it allowing your vehicle to roll freely. Not quite like N drive mode because regenerative braking still happens.
Anyway, long description I know. But the point is, everything relevant to driving is a physical control. During driving, the only thing I find myself going to the touch screen for that could possibly be "nicer" on the stalk is the wiper settings which I generally just leave on "Auto" anyway. This setting is made visible if you manually activate the wiper and is very close to the steering wheel. very easy to use.
All other driving related things on the touch screen are things you use when not actively driving, unless you're some weirdo who wants to switch their lights on and off manually or something, idk.
The UX of the Model 3 is impeccable.
Edit: forgot to note, the 4-way controls on the steering wheel also click in, so left side is going to pause/play with that. And honestly off the top of my head I can't remember what clicking the right one does.