A lot of assumptions made here. Young Kid, incompetent, tire yellow dot etc.
I have had series 4 and 5 Michelin Pilots installed on various motorcycles. None of em had a 'balance dot.'
Don't know if OP shared info re what tire originally on wheel...what weights were etc.
With few exceptions, I change and balance my motorcycle tires....have for years. Friend has a NORTRON wheel balancer....electronics indicate weight required, where to place weight(s) including where to place relative to center line. Have checked balance on lots of wheels (no tire, some with, some without rotor )and some of the cast wheels on our ST 1300's and some Wings.......have been out of balance as much as 5 ounces. 2 to 3 not uncommon. Similar too for some cast wheels on other machines.
A friend rides a Ducati. Owns two. Wheels on both are billet. Balance is perfect. Michelins installed. No weights. Maybe really lucky...perfectly balanced tires (when new).
I have had good service at Cycle Gear.....2 or 3 different shops. My own wheels and some with friends. Whether tires from C G (seldom) or brought in tires purchased elsewhere or (if less than 5 years old, good integrity etc.) to be taken from one rim to mount to another..... Never a problem. And in keeping with my 'bare' wheel balance protocol, I asked the hands on person to check wheel balance. Have always obliged. At no extra cost. One could speculate that before C G called customer re the excess weight in wheel......the 'move tire on wheel' trick was done. Easier than making a perhaps 'awkward' phone call.
Same with my auto rims, trucks, and even the wheel / rotor assembly on my (half share ownership) Cessna 310. always check em bare....... I just asked. Never ever a 'problem.' And, some wheels, just tossed them....out of spec.
I started and operated the largest brake specialty repair shop in North Vancouver..... at peak, had 10,000 square foot service area.....15 techs. Brakes and tire mounting / balancing. 15 years and what a great time we all had there..... It was interesting, sometimes.....to balance a wheel.......was not true, too much weight required...even with a tire mounted and moved on rim etc....The customer would go crazy. Hey, just showing and telling you what we got. Well, your machine is wrong, you are wrong etc..... No......you sir...you are wrong. Customer always right? Not bloody likely.
No war intended here. If I can ask something of the 'tire guy', anybody can. And we should...
Have used Dyna Beads. Excellent. Ride On....Great stuff. Works perhaps better than advertised.