Very nice rejection of Jesus Himself who in His explanation of this parable (all symbolism stripped away) said the seed is people, people of the kingdom and people of the evil one but people, not the gospel.
The parable of the sower, just before this parable of the good seed and the tares, says that the seed is the message but NOT IN THE PARABLE OF THE GOOD SEED AND THE TARES...Matt 13:38 The field is the world, and the good seed stands for the people of the kingdom. The weeds are the people of the evil one, 39 and the enemy who sows them is the devil.
If this is a mistake, an oversight, then fine but never speak this way again. If it is your calculated opinion then you contradict Christ to suit your sectarian human wisdom. Just because you cannot think of an interpretation that suits you and does not support my contentions is NOT a good reason to go against Christ like this... the seeds in this parable are people.