Not wanting to be rude, but this is almost complete bullshit. Just for starters, advising anybody to forget about tablets because the cheap ones are ineffective is total nonsense, especially when you then go on to talk about sourcing anti-malarial tablets locally in Ethiopia.
Where do you get your information that doxycycline "won't protect you much", given that it is one of the prophylactics recommended for Ethiopia by people who actually are doctors? Who in their right mind would opt to buy malarial prophylactics in Ethiopia if they could buy them from a licensed pharmacist in the UK for next to nothing?
http://www.fitfortravel.nhs.uk/destinations/africa/ethiopia/ethiopia-malaria-map.aspx
https://wwwnc.cdc.gov/travel/yellowbook/2018/infectious-diseases-related-to-travel/yellow-fever-malaria-information-by-country/ethiopia#seldyfm879
Take your pick: there is some malaria risk throughout the country below 8,500ft. The NHS describes it as "high" risk, CDC as "moderate". Personally, I took doxycycline as it is cheap and I don't react badly to it.