Stripe just shut down a small biz
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Also means a small group of people from a competitor can shut down anyone's strips account, just get a few people to buy and chargeback.
In many cases chargebacks also take time to hit the payment provider, meaning the rate is well over 5/200. If those were competitors, she should have won the 3 LOST chargeback cases.
She also did not explain why people are asking for chargebacks and if those were justified. We don't know her product.
Last time I saw someone complaining about getting many chargeback and how stripe was treating him unfairly. His product only had 1 star reviews, but on his landing page he put "Over 10,000 happy customers", with 5 green stars, like they were from Trustpilot. His product was overpriced and of very poor quality. He only offered partial refunds, and those were attached to some conditions and had to be begged for.
With the way chargebacks work, it isn't necessarily their money.
There must be viable alternatives to Stripe that are popular, Paddle and Gumroad and maybe Square are good options here.