To be frank your article has given a lopsided view of reality giving emphasis on vaccination and disregarding natural infection. Here are some of the flaws in your article:
1. "From the start, public health officials made it clear that breakthrough infections would be a thing. While the vaccines we have are highly effective, they’re not perfect."
Not at all. Only recently it has been a big issue as the highly boasted more than 90% efficacy declared in the early part of this year was flawed as given in the article below
As of mid July in the mostly vaccinated Israel the efficacy had dropped to 39%.
2. "The truth is, when it comes to a vaccinated person’s real risk for hospitalization or death due to Covid-19, the emergence of the Delta variant has changed nothing. Furthermore, most of the breakthrough hospitalizations and nearly all the deaths have occurred among older or immune-compromised adults. "
The real truth is even for the unvaccinated the emergence of delta variant has changed nothing. Vaccinated or unvaccinated the deaths before delta and after delta, the deaths have occurred among older or immune compromised. That's why we need to have a holistic view of vaccines, i.e., even if it is required should be more focused as given in below article
Self protection is the best protection with or without vaccines
3. "The Delta variant has weakened those protections. Exactly how much it has weakened them isn’t certain."
It is natural for viruses to mutate. The corona virus is a highly mutating virus like flu and spreads through respiratory droplets. To avoid future deadly variations or strains it is essential we change the ways we used to create them or spread them. The below article will help to understand those.