The question the Israeli study, at least as that article described it, seemed not to explore was whether recovered people have immunity against a wide range of variants or "just" what was in circulation in Israel at the time. It's known that the Pfizer (the vaccine Israel has been using), Moderna, and J&J vaccine are effective against currently known major variants (in degrees varying with the variants).
At just about any time in a person's life they have antibodies for all kinds of antigens floating about in their bodies. There is no reason to assume that for some magical reason, unlike the hundreds or thousands of types of antibodies floating about a vaccine recipients' body, the antibodies produced from a Covid vaccine would conflict with the antibodies from having recovered from Covid.
I've put my arm where my keyboard is. I recovered from Covid in January and will receive Pfizer 2nd dose next week.
I wonder how many DU members, on open forum or silently, are Covid-vaccine-hesitant or full anti-vaxxer. Antivaxxers are or no particular partisan identity. OTOH, in the months prior to the November election, Biden, Kammie, and several Dem goobernors were going Full-FUD against the Trump Vaccine.