In fact EU material written prior to the prequels frequently had Jedi falling in love, getting married and starting families, in addition to there being no age restriction to joining the Jedi order and we even had some Jedi taking more than one apprentice at a time.
I think that is the version of the Jedi from older times. I think Lucas was deliberately layering in some things he might have observed from the older stodgy religions to make the PT Jedi a bit off. At their core they are still the same, but they are operating under stricter rules and some Jedi chafe at those rules, like Qui-gon Jinn. I think that the minor schism between Qui-gon and the council is Lucas showing us that the current Jedi order has imposed additional limits on itself. I think this is further illustrated in Anakin’s fall. I think this is shown in the films and I think it is reinforced by what Dave Filoni said that Lucas told him about the significance of Qui-gon’s death. Qui-gon is the master Anakin needed. He would have been the chosen one and would have brought balance to the force without the destruction that resulted. But he got Obi-wan. A perfectly capable master for any regular student, but not the master that Anakin needed because Obi-wan followed the council (and was on the council). Lucas was playing the story overly subtle in the PT and there is a lot that you can dig out that isn’t immediately obvious but is there in multiple places. I think the add campaign for AOTC partly shows this with the rules for being a Jedi that they used that Anakin obviously had problems following. Those rules, as they were in the add campaign (print and trailers) weren’t in the film, but are clearly part of the story. In the film we just see Anakin chafing at several rules and reference to attachments vs. love.