Just because the government has at some point invested in something doesn't mean it had to for it to take off. Once something is already going strong, it's to be expected that everyone who might stand to benefit will want to hop on the bandwagon, especially once the utility is proven. For example the government was not particularly involved with aircraft development until WW1 when it proved to be of considerable military importance.

It's also worth noting that many developments are unintended spillover from other efforts. For example a lot of US government money went into producing high purity germanium, which would ultimately enable the development of the solid state transistor, but the government wasn't directly trying to produce solid state transistors, they instead were concerned with producing diodes for radars.

In either case, I would not describe it as seed investment.