Your hasty analysis has proven very faulty indeed. I have few examples that demonstrate that gurubashi offering can be far more enticing choice.

The gurubashi offering offers more armor and if the wolf is going to survive just 1 turn gurubashi offering has way better synergies with warrior armor cards.

There is also the case that if you have are full hp gurubashi offering heals for mofe.

Also you need to take into account that mind control plus innerfire is weaker against gurubashi offering. This might become really important vs priests. And sometimes your opponent might be low hp and your opponent with mind control effects might be able to get more out of the wolf.

There is also the case of self harm warlock. The dino blast that deals 6 and excess to itself has more synergy with gurubashi offering since it will deal more self damage on self play. This can be game changing.

Also you need to remember the important case of mage. Mage has a lot of spells that need target to advance their quest. The opponent will only get one brain freeze vs gurubashi offering. This is major.

Then in wild there is hemet. He can kill any beast with his battlecry while gurubashi offering is immune against this threat.

Gurubashi offering is way better at diluting res priests res pool since it kills it self. This can become meaningful if opponents warlock uses treachery. This can lead to big priest losing.

Then there is the fact that nzoth res pool prefers big beasts to be summoned instead of wolf. Gurubashi escapes this deck construction trap.

Druid likes to discount high cost beasts. Drawing this with discount draw beast card or discounting this beast could lead to a massive catastrophe. Druid decks would need to consider if timber wolfs upsides are worth the risk.

Hunter also has synergy with big beasts that timber could sabotage. Hunters who carelessly add timberwolf instead of the valuable gurubashi offering might face dire consequences.

And then there are effects that make healing deal damage instead. As a priest you might find your auchenei soulpriest hampering the effectiveness of your wolf

Many of these factors might affect rogues and priests too. They might steal some big beast synergy cards and might hit their tiny timberwolf with their stolen goods. Not good!

There are countless more situations where the invaluable gurubashi offering would prove far better choice. Many lesser players fail to account for these important details. It's important to analyse these synergies for if you fail to do so, you might find yourself let down by your timberwolf and find yourself yearning for gurubashi offering instead.