[sim-]

While TCP is not ideal for this application by nature of it trying to be a fully reliable stream protocol, one often overlooked advantage of its congestion control is that it allows the stream to play nicely with others. For example, if you develop a datagram-based transport whose data rate results in congestion at some point in the network path, any TCP going through the same point would back off to nearly nothing in an attempt to save the link.

You can be greedy and take the bandwidth anyway at the expense of everything else, but possibly (in some conditions) this may even cause a worse outcome even for your traffic. It's likely better to change your data rate target and drop rarely than to send too much and drop randomly at a higher rate.