Before iMessage (yes it existed) all text messages were green. Blue denoted iMessage. There was no evil plan from Apple like bloggers love to conceive for attention - it’s merely what was originally chosen and they wanted to differentiate iMessage when they released it.
You know why they wanted to differentiate iMessage? It caused issues with SMS. They knew it. They wanted an easy out for the incompatibilities. It is a problem with the "plebs" not Apple. The "plebs" were just holding their phones wrong. After all, even iPhone users don't know how to hold their phone. How can "plebs" be expected to know how to hold their phones if iPhone user can't?
Apple could fix this if they wanted to, but they don't want to. They know it sells phones. It is intentional.
